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| 1st(1st leg) | CD Numancia | - | Real Zaragoza | 1:1 (1:1) | ||
| 2nd (2nd leg) | Real Zaragoza | - | CD Numancia | 1:2 (0:0) | ||
| 1st(1st leg): 06/06/2018 19:30 | 2nd (2nd leg): 09/06/2018 17:00 | Winner: CD Numancia | ||||
| 1st(1st leg) | Real Valladolid | - | Sporting Gijón | 3:1 (3:0) | ||
| 2nd (2nd leg) | Sporting Gijón | - | Real Valladolid | 1:2 (0:2) | ||
| 1st(1st leg): 07/06/2018 19:30 | 2nd (2nd leg): 10/06/2018 19:30 | Winner: Real Valladolid | ||||
